Buchla model 291 Dual Voltage-Controlled Filter

Buchla Series 200

Two bandpass filters with voltage-controlled center frequencies and bandwidths. Center frequency range is from 30 Hz to 15 kHz; bandwidth range is from one semitone to four octaves. Offset controls are used to set initial parameter values; processing controls establish range and direction of applied control voltages. Unit has modulation inputs, resonance controls, exceptionally low noise and high dynamic range.